BY REV. T. BLACKBURN. 489 



FF. Pronotum with a very deep and 

 elongate transverse sulcus behind 



the middle SiX&tum, Blackh. 



FFF. Pronotum with a large nitid exca- 

 vation on either side of middle 



near base Sloanei, Blackb. 



CC. Antennal club globular. 



D. Upper part of retuse area of pronotum 



pilose Tatei, Blackb. 



DD. Ketuse area of pronotum glabrous Bovilli, Blackb. 



BB. Retuse area of pronotum not concave Carpentaria, Macl. 



Feinales. 



A. Frontal wings on a plane greatly lower than that 



of the frons cavicollle, Macl. 



AA. Frontal wings continuing the plane of the frons. 



B. Front tibiae with 6 external teeth Sloanei, Blackb. 



BB. Front tibice with only 5 external teeth. 

 C. Transverse carina of pronotum bent hind- 

 ward at its ends so as to point to middle 

 of sublateral fovese. 

 D. Left mandible (viewed from above) strongly 

 sinuate externally. 

 E. 14th and 15th stria? of elytra not con- 

 fluent Macleayi, Blackb. 



EE. 14th and 15th striae of elytra confluent 



in their front part rhinoceros, Macl. 



DD. Left mandible (viewed from above) 



scarcely sinuate externally neglectuvi, Hope 



CC. Transverse carina of pronotum not 

 shaped as in C (and less strongly cari- 

 niform). 

 D. Left mandible (viewed from above) 



strongly sinuate externally before apex angulicorne, 3Iacl. 

 DD. Left mandible not (or scarcely) sinuate 

 externally. 

 E. Elytral interstices non-punctulate; elytra 



broadly margined at humeral angle... hippopus, Macl. 

 EE. Elytral interstices conspicuously punc- 

 tulate ; elytra narrowly margined at 



humeral angle cornigerum, Macl. 



32 



